CH3 N NH2 CH2CH2OH ·HCI N CH cr CH3 NaOH N NH2 O H SNa CH2CH2OH N N CH2 CH3 -H,O CH3 入 N SNa CH2CH2OH CH3 N CH3 N NH2 CH2 N S CH2CH2OH CH3 Cl - HCl NaOH N CH3 N NH2 CH2 S CH2CH2OH CH3 N C O H Na －H2O N CH3 N N N S CH2CH2OH CH3 Na